Terms
By using Blue Hour Calculator, you agree to use the site as a planning aid and to verify important conditions in the field.
Planning guidance
Natural light calculations are estimates. Weather, terrain, buildings, access restrictions, and local conditions may change the useful shooting window. Always verify safety, access, and weather before traveling to a location.
Acceptable use
You may use the calculator and articles for personal and professional photography planning. Do not abuse, scrape, or disrupt the site or attempt to interfere with normal service.